[URGENT] Large Server (90TB) — Library Scans Stalling on Synology NAS

[BaNanaBlocks 9]

Running into a persistent issue I haven’t seen in years and could really use an experienced set of eyes.

• Emby Server: Windows PC
• Storage: Multiple Synology NAS devices (currently 2, adding a 3rd)
• Library Size: ~90TB

Issue:
Two of my largest libraries will not complete a scan.

• Scans start but never finish
• Content remains unavailable for playback
• Metadata is not updating

This has been happening consistently for several days now.

Impact:
This is effectively blocking access to a large portion of my media and breaking normal server operation.

What I’ve tried:

• Re-running scans multiple times
• Waiting extended periods (no completion)

Request:
Looking for guidance on:

• Identifying what’s causing the scan to stall
• Logs or diagnostics I should pull immediately
• Known issues with large libraries + Synology setups

Happy to provide logs, screenshots, or run targeted tests right away.

Edited 1 hour ago by BaNanaBlocks
Added additional information.